Machine for operating on shoes



March zo, 1945. 1.-. w. DE To@ 2,371,741

MACHINE FOR OPERATING oN sHoEs Filed Aug.' 2o, 194s 5 sheets-sheet 1 "Frank .WL D e To ur WJOD U MUY w 'UH "Vu March 20, 1945..

F. W. DEv TOUR MACHINE FOR OPERATING ON SHOES Filed Aug. 20. 1943 5 Sheets-Sheet 2 nven for Frcmk W DeTouv By Attorney 121. MOTORS. EXPANSIBLE UKUbS Humm Search HOOR CHAMBER TYPE,

ma@ yh' I rney A 42 ha Cm REWE-lm! Samh M March 20, 1945. F. w. DE TOUR 2,371,741

MACHINE FOR OPERATING ON SHOES Filed Aug. 20. 1945 5 Sheets-Sheet 4 In ven for Trank VV DeTom- By '5 Attorney March 20, 1945. F. w. DE TOUR 2,371,741

MACHINE FOR OPERATING ON SHOES Filed Aug. 20, 1943 5 Sheets-Sheet 5 [n venlor 326 Frank. W. DeT lu' FQ. B -1S Attorney Patented Mar. 20, 1945 MACHINE FOR OPERATING ON SHOES Frank W. De Tour, Beverly, Mass., assignor to United Shoe Machinery Corporation, Flemington, N. J., a corporation of New Jersey Application August 20, 1943, Serial No. 499,348

35 Claims.

This invention relates to machines for operating on work pieces and, more particularly, to machines for leveling the bottoms of shoes. The invention is herein illustrated with reference to that type of machine having a shoe support arranged for swinging movements lengthwise of a shoe thereon to carry it below a leveling roll which thus acts progressively along the shoe bottom. The roll is arranged for movement heightwise of the shoe support and for tipping movements laterally of the support about an axis extending lengthwise of a shoe on the support. It will be understood, however, that the invention in some of its aspects is not limited to machines of the particular type illustrated.

An object of the invention is to provide a machine for operating on work pieces in which a tool is movable in angularly related paths relatively to a work support and in which the movement of the tool is governed by a single manually operated control member movable indifferent paths, movement of which in one path causes the tool to move along one path and movement of the control member in another path causes the tool to move along the other path.

More specifically, it is an object of the invention to provide a leveling machine having a leveling roll movable heightwise relatively to a work support and also arranged for tipping movements relatively to the work support, in which the heightwise and tipping movements of the roll are controlled by a single manually operated member.

For the purposes` in view and in accordance with a feature of the invention, the tool or leveling roll is acted upon by two iluid-pressure-operated members, one of which eiTects movement of the roll toward the work support and the other one of which imparts tipping movements to the roll. These fluid-pressure-operated members are individually controlled by valves which are in turn controlled by a single manually operated member. This member moves along two diiercnt paths and is connected to the valves to operate one of their.l in response to movement of the member along one path and to operate the other valve in response to movement of the member along the other path.

In accordance with another feature of the invention, the leveling roll is normally held in an elevated position by a spring and .is moved downwardly into engagement with a shoe bottom by a power-operated means under the control of the operator. As illustrated herein, the power-operated means is in the form of a duid-pressureoperated member. The power applied to this member is readily varied by the operator thereby to control the pressure applied by the roll to the shoe bottom. Provision is made for preventing downward movement of the leveling roll until the Work support has been moved to carry the toe end of the shoe thereunder. Upon initial movement of the control member a predetermined extent the roll is moved down against the shoe bottom with a predetermined minimum pressure and upon further movement of the control member the pressure on the roll is increased in accordance with the extent of such further movement of the control member. Upon movement of the control member along a different path the leveling roll is tipped to an extent determined by the extent of such movement of the control member,

The above and other features of the invention including various novel details of construction and combinations of parts will now be more particularly described by reference to the accompanying drawings and pointed out in claims.

In the drawings,

Fig. l is a view in right-hand side elevation of a machine in which the invention is embodied, parts of the structure being broken away and other parts being shown in section;

Fig. 2 is an enlarged side elevation of the hand control member and associated parts for ccntrolling the pressure of the leveling roll and the tipping of the roll;

Fig. 3 is a front elevation of the hand control member of Fig. 2;

Fig. 4 is a plan view partly in section of a portion of the mechanism shown in Fig. 2;

Fig. 5 is a section on the line V-V of Fig. 2;

Fig. 6 is a view, partly in right-hand side elevation and partly in section, showing the iiuidpressure means for imparting to the leveling roll its tipping movements with its controlling valve mechanism and operating connections;

Fig. '7 is a plan view partly in section of the iiuid-pressure-operated mechanism for controlling the pressure of the leveling roll;

Fig. 8 is a side elevation partly in section of the mechanism shown in Fig. 7;

Fig. 9 is a vertical section through the control valve of Fig. 4;

Fig. 10 is a vertical section through the uidpressure-operated mechanism along the line X-X'of Fig 7; and

Fig. 11 is a sectional View through the fluidpressure-operated mechanism; this mechanism being spread open better to show the arrangement of the parts.

The invention is illustrated herein as embodied in a machine of the type shown in Letters Patent 2l i. wluluno.

CHAMBER TYPE,

of the United States 2,230,244 granted February 4, 1941, on an application filed in the names of F. V. Hart and J. J. Austin. As shown in that patent, the machine includes a main frame I within which is pivotally mounted a shoe support or jack I2 on a shaft |4. The jack includes a toe post i6 fast on the shaft I4 and a heel post I6 loosely mounted on the shaft I4. The toe and heel posts are locked together by an arm after a shoe has been placed on the jack and after the heel post has been adjusted in position relatively to the toe post-in accordance with the size of the shoe to be operated upon, as described more fully in the patent referred to above.

The jack I2 is moved by fluid-pressure mechanism to carry the shoe rearwardly and forwardly beneath a leveling roll 22 which is arranged to be held against the bottom of the shoe under a, controllable heavy pressure by mechanism to be described. For thus moving the jack I2 an arm 24 surrounding the shaft I4 is secured to the toe post I6 of the jack and is provided with segmental teeth 26 formed on its rearward portion. The arm 24 is connected by gearing (not shown) with a fluid-pressure motor which includes cylinders 28 and 30 into which operating fluid is admitted selectively through pipes 32 and 34 from a valve controlled by a manually operated lever 36. Fluid under pressure is delivered to this valve from a pump mounted in a reservoir `42 in the bottom of the frame I0, the uid being delivered to the valve through a pressure-regulating valve 44 and a pipe 45. 4The valve 44 is set, when the machine is at rest, so that only a minimum pressure is delivered by the pump. Upon movement of the lever 36 rearwardly of the machine, fluid under pressure is delivered into the cylinder 30 to move the jack rearwardly of the machine. Suitable follow-up mechanism is provided so that the speed and extent of movement of the jack is proportional to the speed and extent of movement of the lever 36.

The pressure-regulating valve 44 is controlled by a toggle mechanism 46 which, upon being straightened, operates the valve so that fluid under high pressure is delivered therefrom. This toggle is arranged to be straightened by a rod 48 which is moved forwardly of the machine by a spring 49 upon the initial rearward movement of the jack. Accordingly, after a slight rearward movement of the jack. fluid under high pressure is available to move the jack further under the leveling roll 22. The mechanism which has been thus far briefly described is identical with that shown in the patent referred to above, to which reference may be made for a more complete disclosure of the construction.

The leveling roll 22 is mounted for turning movement on a rod 4`I in a, holder 49 pivotally connected at 50 to a carrier 52 mounted for tipping movements laterally of the machine about the axis of a forwardly and rearwardly extending shaft 53 supported in bearings at the top of the frame I0. The holder 49 has a rearwardly extending arm 54 connected by a short link 56 to the rearwardly extending arm 58 of a bell-crank lever 60 fulcrumed at 62 to the carrier 52. The bell-crank lever has a pair of downwardly extending arms 64 carrying trunnions 66 extending into a circumferential groove 68 formed in a bushing 'I0 slidably mounted on the shaft 53. The bushing '|0 is normally held forwardly on the shaft 53, as shown in Fig. 1, with the leveling roll 22 in an elevated position by a spring I2 connected by a pin I4 to the machine frame I0 and lil) CROSS REFBQM searcn nw a forwardly extending arm 16 of a bell-cranklever I8 pivotally mounted on a shaft 80 supported by suitable bearings in the frame I0. The bell-crank lever includes an upwardly extending arm 82 the upper portion of which is forked to straddle the bushing l0, the arms of the forked portion carrying trunnions 84 extending into a circumferential groove 86 in the bushing 10. The bushing 'I0 is moved rearwardly along the shaft 53 against the force of the spring 12 by fluidpressure mechanism under the control of the operator to carry the roll into engagement with the shoe bottom by mechanism to be hereinafter described.

For imparting to the leveling roll 22 its tipping movements laterally of the shoe, there is provided a fluid-operated member (Fig. 6) having formed thereon rack teeth 92 engaged by the teeth of the segment gear 34 fast to a laterally extending shaft 66 supported by suitable bearings formed in a bracket 68 which is supported by a laterally extending shaft |00 and a crossbar |02. Secured to the outer end of the shaft 96 is a lever |04 connected by an adjustable link |06 (Fig. l) to a laterally extending arm |08 on the roll carrier 52 mounted for tipping movements laterally of the machine about the axis of the shaft 53. The member 80 has fast to its opposite ends pistons ||0, ||2 (Fig. 6) slidably mounted in cylinders II4, ||6 supported by the bracket 38 and connected respectively at their lower and upper ends by pipes ||8, |20 to a valve casing |22 in which there is valve mechanism movable by the operator to control the flow of fluid to one or the other of the cylinders ||4, |I6 and thus to control the direction of tipping movement imparted to the carrier 52 and the leveling roll 22. The pressure fluid is supplied from the pump 40 through the pressure-regulating valve 44 and the pipe 45.

The valve casing |22 is provided. with ports |24 and |26 communicating respectively with the pipes I I8 and |20 and a port |28 intermediate the ports |24 and |26 communicating with the supply pipe 45. A sleeve |30 in the casing |22 has ports |32, |34 opposite the ports |24, |26 and a port |36 opposite the port |28, each port in the sleeve |30 comprising an annular groove and holes connecting each groove with the interior of the sleeve. A hollow valve member |36 fitted to slide in the sleeve |30 has its opposite end portions flanged to close the ports |32, |34 and its intermediate portion reduced in thickness to form an annular chamber |40 communicating through the ports |38, |28 with the pipe 45..

The valve member is controlled manually by a hand lever |42 fulcrumed upon a pin |44 carried by the parallel walls of a U-shaped arm |46. This arm is in turn fulcrumed at its lower end on a shaft |48 carried by a boss |50 extending forwardly from the frame I0. For limiting the movements of the lever |42 within the arm, the lever, near its upper end, carries a bolt |52 which moves in slots |54 formed in the parallel walls oi the arm |46. 'I'he lower end of the lever is forked at |56 to embrace the head |58 of a vertically extending pin |60 journaled in an arm |62 which is in turn secured to the lower end of a vertical shaft |64 journaled in the frame I0. The head |58 of the pin |60 is provided with spherical surfaces engageable with the forked end of the lever |42 to permit freedom of movementl between the lever and the pin upon movement 0f the lever about its fulcrum |44 or upon movement of the arm |46 about the shaft |48.

milf i?? 't To the upper end of the shaft |64 (Fiss. 2, 4 and 5) is secured an arm |65 which is in turn connected to one end of an extensible link |66 which passes through a sleeve |68 held by a bracket |10 secured to the frame of the machine. The other end of the link |66 is connected to a downwardly extending arm |12 of a bell-crank lever |14 fulcrumed at |16 in the machine frame. The other arm |18 of the bell-crank lever is connected by a pair of links |80 to a lever |82, one end of which is pivotally connected to the head |84 of a rod |86 that extends downwardly through a bore in a cap piece |88 secured to the upper end of the casing |22 by screws |90. At its opposite end the lever |82 is connected to the upper end of a link |92, the lower end of which is pivotally connected to a forwardly extending arm |84 on the lever |04. The rod |86 is held by a relatively stiff spring |86 in engagement with a crossbar |98 that engages the top face of the valve member |38, the spring |96 extending downwardly through the hollow valve member |38 and being connected at its lower end to a crossbar 200 engaging the bottom face of the valve member. A cap piece 202 connected to the casing |22 by screws 204 for closing the lower end of the casing has downwardly extending therefrom a pipe 206 to provide a passage for the exhaust of the uid from one or the other of the cylinders ||4, ||6

through the ports controlled by the valve member |38 and the interior of the casing |22 to the reservoir 42.

From the above description it will be evident that the operator may by movement of the hand lever |42 to the right move the valve member |38 downwardly in the casing |22 to open the ports |32, |24 andthereby admit pressure uid into the cylinder ||4 to cause upward movement to be imparted to the member 90 and thus to tip the leveling roll in a counterclockwise direction, as viewed from the front of the machine, about the axis of the shaft 53; or by movement of the hand lever |42 to the left he may move the valve member |38 upwardly to open the ports |34, |26 and thereby admit pressure fluid into the cylinder I6 to cause downward movement to be imparted to the member` 90 to tip the leveling roll in a clockwise direction about the axis of the shaft 53. As previously pointed out, the member 90 is connected to the roll carrier 52 through the segment gear 94, rock shaft S6, lever |04 and adjustable link |06, and as the lever |84 is swung in either direction by the movement of the member 00 it tends to swing the lever |82 about its pivotal connection to the links |80 in a direction to return the valve member |38 to the position shown in Fig. 6 and thus to stop the tipping movement of the roll 22 unless the operator is at the same time moving the hand lever |42 in a direction to counteract this tendency to close the valve |38. It will thus be evident that, by means of the hand lever |42, the operator may cause the roll 22 to be tipped laterally of the shoe in either direction at any desired inclination in operating on any portion of the shoe bottom. It will also be evident that the roll may be tipped at dierent rates of speed depending upon how fast the hand lever |42 is swung by the operator to open the ports |24, |26. In order to limit the extent to which the valve |38 may be moved to open with the port |24 or the port |26, and thus to determine the maximum speed at which the roll may be tipped in either direction, there is threaded onto the cap piece |88 an adjustable rod 208 having formed thereon a collar 2|0 which limits downward movement of the valve |38 to open the port |24 by engagement with an arm 2|2 on the head |84 of the rod |86. The rod 208 extends upwardly through an opening in the projection 2|2 and threaded on the upper end of the rod is a. nut and lock nut 2|4 that limits upward movement of the valve |38 to open the port |26. If the rate of speed of the hand lever |42 is accelerated fast enough in either direction to move the arm 2|2 into engagement with one or the other of the stops 2|0, 2|4 the roll will be tipped at the maximum rate of speed. It will be evident also that in the event of an abnormal acceleration in the speed of movement of the hand lever in either direction, engagement of the arm 2|2 with one or the other of said stops will retard further movement of the hand lever.

Provision is made for insuring that the leveling roll will be moved to a substantially horizontal position when the lever |42 is released by the operator so that the roll will be properly positioned in its angular relation to the shoe bottom at the beginning of the leveling operation. For this purpose, springs 220 and 222 Fig. 4)- surround the link |66 within the sleeve |68 and at their adjacent ends engage shoulders formed within the central portion of the sleeve |68. The outer ends of the springs engage collars 226 and 228 respectively near the outer ends of the link |66.4 These collars carry pins 230 which extend through slots 232 in the sleeve |68 to prevent turning of the collars with respect to the link |66 when the operator releases the lever |42. At the end of -the leveling operation, the springs 220 and 222 will cause the link |66 to assume a mid position with respect to the sleeve |68, in which the lever |42 is in a mid position with respect to its movements laterally of the machine. In this position of the lever the leveling roll is in a substantially horizontal position. From the foregoing, it will be seen that the operator may by movement of the hand lever |42 laterally of the machine control the direction, extent and speed of tipping movement of the leveling roll which is moved into positions corresponding to the position of the hand lever laterally of the machine; and the action of the springs 222, in moving the hand lever to a mid position upon its release by the operator, will cause a corresponding movement of the leveling roll to a mid or horizontal position.

Vertical movements of the leveling roll 22 and the pressure applied by the leveling roll to the sloe bottom are controlled by moving the control lever |42 and with it the arm |46 about the shaft |48- in the direction of movement of the jack. The arm |46 includes a depending portion 260 which is connected by a link 262 (Figs. 2 and 5) to an arm 264 of a vertically extending lever 266 pivoted at 268 to the machine frame. The lever 266 includes a second arm 210 connected by a rearwardly extending link 212 to an arm 214 (Figs. '1 and 8) secured to a shaft 216 extending transversely or". the machine frame and supported by bearings 289 and 282. Also secured to-the shaft 216 is a depending arm 284 connected by a link 286 to the forward end of a cam plate 288 constrained for horizontal sliding movements along the top of a fluid-pressure-motor housing 290 by U-shaped brackets 282 carrying pins 294 extending through slots 296 in the cam plate. This cam plate is provided with an inclined cam surface 298 against which bears a roll 300 journaled at the forward end of an arm 302 pivotally connected to a bracket 384 extending upwardly from the housing 290. Upon movement of the control lever |42 rearwardly of the machine from the position illustrated in Fig. 1, the cam plate 288 is moved forwardly by the aforedescribed connections to thecontrol member so that the cam surface 29B acts on the roll 300 to move it upwardly, thus moving the forward end of the arm 302 upwardly.

The forward end of this arm is connected by a link 306 (Fig. 11) to the upper end of a valve 308 which admits uid under pressure, as will be fully explained, into a cylinder 3|0 below a piston 3|2, thus causing the piston to move upwardly. This piston is connected by an arm 3|4 (Figs. 1 and 8) to the forwardly extending arm 16 of the bell-crank lever 18. Consequently, as the control lever is moved rearwardly of the machine and the piston 3|2 is moved upwardly, it acts through the arm 3|4 and the bell-crank lever 18 to move the bushing I0 rearwardly along the shaft 53 which causes downward movement of the leveling roll 22 into engagement with the shoe bottom.

In order to prevent the leveling roll from being prematurely moved downwardly, provision is made for preventing suflicient rearward movement of the control lever |42 to cause the roll to move downwardly until the jack has been moved rearwardly from the position shown in Fig. l to a position in which the toe end of the shoe is beneath the leveling roll. For this purpose a sleeve 3|8 (Fig. 5), movable with the jack about the axis of the shaft I4, has a downwardly extending projection 320 engageable with the upper end of the arm 210 of the lever 266. Whenthe jack is in its forward or loading position, the projection 320 holds the upper end of the lever 266 in its rearward position, as shown in Figs. 1 and 2, thus preventing the operator from moving the control lever |42 rearwardly of the machine to cause the leveling roll 22 to be moved downwardly. However, after the jack has been moved rearwardly a sufficient distance to carry the toe end of the shoe under the leveling roll, the control lever |42 may be moved rearwardly a suficient extent to operate the valve 308 (Fig. 11) to admit pressure fluid into the cylinder 3|0 below the piston 3|2.

The uid-pressure-operated motor for moving the leveling roll downwardly against the force exerted by the spring 12 includes in addition to the cylinder 3|0, piston 3|2 and the valve 308, a pressure-regulating valve 322 (Fig. 11) these being all contained in the housing 290 supported on walls 324 extending upwardly from the top wall of the uid reservoir 42. Pressure fluid passes from the pressure-regulating valve 44 (Fig. 1) through a pipe 326 into a valve chamber 328 housing the valve 308, by way of an inlet opening 330. With the valve in the position shown in Fig. 11, pressure fluid is trapped in the lower portion of the valve chamber by an element 332 of the valve. However, upon upward movement of the valve in response to a rearward movement of the control lever |42 the pressure uid passes from the valve chamber 328 through a port 334 to the pressure-regulating Valve 322. This valve includes a pair of spaced cylindrical elements 336 and 338 .connected by a stem 340 and slidable within a bushing 342 provided with inlet ports 343 and tightly received within a cylinder 344 forming the valve chamber. The lower valve element 336 of the pressure-regulating valve is provided with vertical ports 346 which permit the pressure uid to flow downwardly through a passageway 348 into a horizontally extending passageway 350 leading to the bottom of the cylinder 3|0. Consequently, upon upward movement of the valve 308 pressure uid flows into the bottom of the cylinder 3|0 to elevate the piston 3|2 and depress the leveling roll.

The iluid passing through the ports 346 of the pressure-regulating valve also ows into a vertical passageway 352 past a needle valve 354 into a chamber 356 at the top of the cylinder 344. The fluid in the chamber 356 acts upon a piston 358 connected to the valve element 338 and tends to maintain the valve in its lowermost position with a ange 360 of the element 338 resting upon the top of the bushing 342. The fluid pressure also exerts a force against the under surface of the element 336 of the valve tending to move the valve upwardly, but the valve will stay in the position illustrated until this pressure rises sufflciently to overcome the pressure exerted downwardly on the piston 358. This pressure will never rise suflciently as long as the uid is trapped in the chamber 356, but if the uid be permitted to escape from this chamber there will be sulcient pressure by reason of the pressure drop through the restricted orice at the needle valve 354 to cause an upward movement of the pressure-regulating valve 322 until the inlet ports 343 are shut off by the lower element 336 of the valve. When this happens the flow of pressure fluid to the cylinder 3|0 is cut off and the pressure exerted on the leveling roll is thus regulated. The escape of iluid from the chamber 356 above the pressure-regulating valve is controlled by a valve 364 (Figs. 1, 4 and 9) connected by a. pipe 366 to the chamber 356.

The control valve 364 includes a valve member 368 slidable within a reduced portion of a valve chamber 31|). The Valve member 368 is provided with a bore 312 extending partially therethrough and communicating with radial ports 314 which provide communication between the pipe 366 and an outlet opening 316 upon movement of the valve member to the left from the position shown in Fig. 9 to uncover the ports 314. The valve member is normally held in the position shown, in which the ports 314 are closed by the adjacent wall of the valve chamber, by a spring 318 acting between a ange 380 of the valve member and a flange 382 on a stem 384 slidable within a bushing 386 tted into the left end of the valve'chamber. This stem projects forwardly from the valve chamber, as shown in Fig. 2, to be engaged by an arm 388 pivoted at 390 to the frame of the machine. The upper end of the arm is connected by a link 392 to the U-shaped arm |46 so that upon rearward movement of the control lever |42 the valve stem 364 is moved rearwardly to compress the spring 318 of the valve 364. The amount that the spring may be compressed is limited by a collar 394 clamped to the valve stem 384 engageable with the forward face of the valve housing and this accordingly limits the rearward movement of the control lever |42.

From the foregoing it will be seen that the pressure iluid, upon being admitted to the cylinder 3|0 by upward movement of the valve 308 also passes through the pipe 366 to the control valve 364. The pressure acts upon the valve member 368 to move it to the left against the force of the spring 318 so that after the pressure has increased suiciently the valve member is moved to the left permitting the iluid to pass to the exhaust opening 316. Accordingly, there is an immediate drop in pressure above the piston 358 of the pressure-regulating valve 322, whereupon the pressure exerted upon the lower surface of the cylindrical member 338 of the valve moves it upwardly until the ports 343have been cut oiI, thus limiting the pressure exerted on the lower face of the piston 3|2. The exhaust opening 316 of the control valve 364 is connected by a pipe 396 to a vertical passageway 398 in the housing 230 (Fig. 8) which is open at its lower end to the iluid reservoir. This passageway is also connected by a port 400 with the upper end of the chamber 328 of the valve 308.

The element 338 of the pressure-regulating valve 322 is provided with ports 404 in its under side which provide communication between the space below the valve element and an exhaust port 406, when the valve is moved upwardly beyond the position in which the ports 343 in the bushing 342 are first cut oi. The exhaust port 406 communicates with the upper portion of the valve chamber 328 which in turn communicates with the exhaust passageway 398. During the operation of the machine, when the stem 384 of the control valve 364 is moved from a position in which the spring 318 is compressed, to the left as viewed in Fig. 4, the valve member 368 will be moved to exhaust position by the pressure acting thereon thereby decreasing the pressure in the chamber 356, whereupon the pressureregu lating valve will be moved upwardly by the pressure acting on the element 338. Because of the excess of the pressure below the piston 3|2 and in the passageways 348 and 350, the valve member 322 will move upwardly until the exhaust ports 404 communicate with the port 406. This permits the pressure duid to exhaust through the ports 346 of the element 336 and the ports 404 and 406 rapidly, so that the roll pressure will respond almost instantaneously to the operation of the control valve 364. Were it not for the exhaust ports 404 and 406, the pressure nuid below the piston 3|2 would all have to exhaustl by way of the needle valve 354 and the control valve 364 and the response would not be suciently rapid for satisfactory operation.

In order to permit exhaust of the pressure fluid below the piston 3|2 when the Valve 308 is moved back to closed position, as shown in Fig. ll, so that the roll may be lifted from the shoe bottom, a passageway 408 and a port 4`I0 provide communication with the upper portion of the valve chamber 328. Fluid is prevented from passing from the port 4|0 into the exhaust port 400 by an element 4I2 of the valve 308 when the valve is moved upwardly to open the port 334 to the pressure fluid from the pipe 326 and the inlet port 330 so that the pressure fluid will ow through passageways 346 of the valve element 336 to the cylinder 3|0 and the pressure will build up below the piston 3I2 in accordance with the setting of the control valve 364. The upper end of the cylinder 3|0 is provided with an exhaust port 4M which leads to a pipe 4|6 by which any fluid which may leak past the piston 3|2 may return to the reservoir.

It will be noted in Fig. 2 that when the control lever |42 is in its forwardmost position the arm 388 is spaced from the adjacent end of the valve stem 384. Consequently, during the initial rearward movement of the control lever no movement is imparted to the valve stem. However, during this movement the valve 308 is lifted, as heretofore described, to admit pressure fluid into the cylinder'3l0 below the piston 3|2. The spring 318 of the control valve 364 is at this time ln its most expanded condition so that after the leveling roll is pressed against the shoe bottom with a predetermined minimum pressure, the valve member 368 of the control valve will move to exhaust position. Upon further rearward movement of the control lever |42 after the roll has been forced against the shoe bottom "with .the minimum pressure, the stem 384 of the control valve 364 is moved rearwardly to compress the spring 318 an amount determined by the extent of rearward movement of the control lever. Thus, the force required to move the valve member 368 to exhaust position will vary in accordance with the extent of movement of the control lever after its initial movement, which in turn controls the roll pressure in accordance with the extent of movement of the control lever.

Itwill thus be seen that the roll pressure is controlled by the forward and rearward movements of the control lever |42, the extent of which determines the pressure exerted by the roll upon the shoe bottom. By moving the lever |42 transversely of the machine, the roll is tipped with respect to the shoe bottom, the direction and extent of tipping movement depending upon the direction and extent of movement of the lever, as heretofore explained. Accordingly, by the use of a single manually operated lever the tipping of the roll and the pressure exerted by the roll on the shoe bottom are readily and individually controlled. Whereas a spring is provided for lifting the roll out of engagement with the shoe bottom when the control lever is in its forwardmost position, the roll is moved by uid pressure against th shoe bottom in response to rearward movement of the control lever. By controlling the tipping of the roll and the roll pressure with a single hand lever, the operator with his other hand may control the movement of the jack, and no treadle or extra control member is required for lifting the roll from the shoe bottom, as in prior machines.

Having thus described the invention, what I cla-im as new and desire to secure by Letters Patent of the United States is:

l. In a machine for operating on work pieces, a work support, a tool mounted for movement along two angularly related paths relatively to the work support in operating upon a work piece on the support, separate power-operated means for moving the tool along each of said paths, and means for controlling said power-operated means including a member carried by the machine independently of said tool and movable by the operator along one path for starting one of said power-operated means in operation to move the tool variably in one direction or the other along one path in accordance with the direction and extent of movement of the control member, said member being movable along a different path to start the other one of said power-operated means in operation.

2. In a machine for operating on work pieces, a work support, a tool mounted for movement along two angularly related paths relatively to the work support in operating upon a work piece on the support, separate power-operated means for moving the tool along each of said paths, and means for controlling said power-operated means including a member carried by the machine independently of said tool and movable by the operator laterally of the machine for starting one of said power-operated means in operation to move the tool variably in one direction or the other along one path in accordance with the direction and extent of movement of the control member, said member being movable forwardly and rearwardly of the machine to start the other one of said power-operated means in operation.

3. In a machine for operating on work pieces,

a work support, a tool mounted for movement along two angularly related paths relatively to the work support in operating upon a work piece on the support, separate power-operated means for moving the tool along each of said paths, means for controlling said power-operated means including a member carried by the machine independently of said tool and movable by the operator laterally of the machine for starting one of said power-operated means in operation to move the tool variably in one direction or the other along one path in accordance with the direction and extent of movement of the control member and being movable forwardly and rearwardly of the machine to start the other one of said power-operated means in operation, and means mounting said member for movement forwardly and rearwardly of the machine at any point in its movement laterally of the machine and for movement laterally of the machine at any point in its movement forwardly and rearwardly of the machine.

4. In a machine for operating on work pieces, a work support, a tool, means for moving said tool relatively to said work support to operate on different portions of a work piece thereon, means acting on said tool to vary the pressure exerted thereby on the work piece, and a single operating member carried by the machine independently of said tool for movement along two paths and arranged to control one of said means in response to movement of the operating member along one path and to control the other of said means in response to the movement of the operating member along the other path.

5. In a machine for operating on Work pieces, a work support, a tool, means for moving said tool relatively to the work support to operate on different portions of a work piece thereon, means acting on said tool to vary the pressure exerted thereby on the work piece, a single operating member carried by the machine independently of the tool for movement along two paths, means operated by said member in response to its movement along one path for controlling said rst means to move the tool a distance depending upon the extent of movement of said member, and means operated by said member in response to its movement along the other path to control the second-named means to vary the pressure of the tool on the work.

6. In a machine for operating on work pieces, a work support, a tool engageable with a work piece on the support, means for moving said work support relatively to said tool to cause the tool to operate 'progressively along the workpiece, a control member movable along two angularly related paths, means for moving the tool to various angular positions relatively to the support in response to movement of the control member along one path, and means for moving the tool toward and away from the support to vary the pressure of the tool on the work in response to movement of the control member along the other path.

7. In a machine for operating on work pieces, a work support, a tool engageable with a work piece on the support, means for moving said work support relatively to said tool to cause the tool to operate progressively along the work piece, a

control member movable along two paths, means responsive to movement of the control member alo-ng one path for moving the tool angularly relative to the work support an amount dependent upon the extent of movement of the control member, and means for moving the tool toward and away from the sup-port to vary the pressure of the tool on the work in response to movement of the control member along the other path.

8. In a machine for operating on work pieces, a work support, a tool engageable with a work piece on the support, means for moving said work support relatively to said tool to cause the tool to operate progressively along the work piece, a control member movable along two paths, means responsive to movement of the control member along one path for moving the tool angularly relative to the work support at a speed dependent upon the rate of movement of said member, and means for varying the pressure exerted by the l tool on the work in response to movement of the control member along the other path.

9. In a machine for operating on work pieces, a work support, a tool, fluid-pressure-operated means for moving the tool relatively to the work support to operate on different portions of a work piece thereon, iluid-pressure-operated means acting on said tool to vary the pressure of the tool on the work piece, a control member carried by the machine independently of said tool and movable along different paths, means operated by the control member in response to its movement along one path for controlling the rst uidpressure-operated means to move the tool a distance corresponding to the extent of movement of the control member, and means operated by the control member in response to its movement along another path to control the second fluidpressure-operated means to vary the pressure of the tool on the work piece dependent upon the' extent of movement of the control member.

l0. In a leveling machine, a shoe support, a leveling tool, means for eiecting relative movement of the shoe support and the leveling tool in directions lengthwise of the shoe on the support to cause the tool to operate progressively along the shoe bottom, spring means acting on said leveling tool to maintain it initially in a position above that occupied by it when in engagement with the shoe botto-m, and fluid-pressure-operated means for moving the leveling tool against the force exerted by the spring means into engagement with the shoe bottom.

11. In a leveling machine, a shoe support, a leveling tool, means for effecting relative movement of the shoe support and the leveling tool in directions lengthwise of the shoe on the support to cause the tool to operate progressively along the shoe bottom, spring means acting on said leveling tool to maintain it initially in a, position above that occupied by it when in engagement with the shoe bottom, fluid-pressure-operated means for moving the leveling tool against the force exerted by the spring means into engagement with the shoe bottom, and means for regulating the pressure of the operating uid applied to said iluid-pressure-operated means to control the pressure exerted by the roll on the shoe bottom.

12. In a leveling machine, a shoe support, a leveling tool, means for effecting relative movement of the shoe support and the leveling tool in directions lengthwise of the shoe on the support to cause the tool to operate progressively along the shoe bottom,v spring means acting on said leveling tool to maintain it initially in a posltion above that occupied by it when in engagement with the shoe bottom, fluid-pressure-operated means for moving the leveling tool against the force exerted by the spring means into engagement with the shoe bottom, means for regulating the pressure of the operating fluid to said uidpressure-operated means to control the pressure exerted by the roll on the shoe bottom, and means for rendering said fluid-pressure-operated means inoperative in response to relative movement of the shoe support and the levelingtool to carry the shoe out from under the leveling tool.

13. In a leveling machine, a leveling tool, a shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling tool to operate progressively along the shoe bottom, means for varying the position of the tool relatively to the support to operate on different portions of the shoe bottom, means for varying the pressure exerted by the tool on the shoe bottom. and a single manually operated member for controlling both of said means.

14. In a leveling machine, a leveling tool, a shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling tool to operate progressively along the shoe bottom, power-operated means for moving the tool relatively to the support to operate on diiTerent portions of a shoe bottom, power-operated means for controlling the pressure of the tool on the shoe bottom, a control member movable along diierent paths, means operated by the control member in response to its movement along one path to control the rst power-operated means, and means operated by the control member in response to its movement along another path for controlling the operation of the lastnamed power-operated means.

15. In a leveling machine, a leveling tool, a shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling tool to operate progressively along the shoe bottom, means operated by the pressure of fluid against it for moving the tool relatively to the support to operate on different portions of the shoe bottom, means operated by pressure of uid against it for controlling the pressure of the tool against the shoe bottom, and a single operating member in control of both said pressure-fluidoperated means.

16. In a leveling machine, a leveling tool, a shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling tool to operate progressively along the shoe bottom, means operated by the pressure of fluid against it for moving the tool relatively to the support to operate on different portions of the shoe bottom, means operated by pressure of uid against it for controlling the pressure of the tool against the shoe bottom, a control member movable along two different paths, means operated by the control member in response to movement along one path for controllng said rstnamed means, and means operated in response to movement of the control member along the other path for controlling the second-named means.

17. In a leveling machine, a leveling roll, a shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling roll to operate progressively along the shoe bottom, means for tipping the leveling roll relatively to the shoe support, means for varying tom, and a single, manually operated member for controlling both said means.

18. In a leveling machine, a leveling roll, a shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling roll to operate progressively along the shoe bottom, power-operated means for tipping the roll relatively to the shoe support, poweroperated means for pressing the roll on the shoe bottom, a control member movable along different paths, means operated by the control member in response to its movement along one path for operating the first-named power-operated means, and means operated by the control member in response to its movement along another path for controlling the second power-operated means.

19. In a leveling machine, a leveling roll, a shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to causethe leveling roll to operate progressively along the shoe bottom, means operated by the pressure of fluid against it for tipping the leveling roll relatively to the shoe support, means operated by the pressure of fluid against it for pressing the roll against the shoe bottom, and a single operating member in control of both said huid-pressureoperated means.

20. In a leveling machine, a leveling roll, a shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling roll to operate progressively along the shoe bottom, means operated by the pressure of uid against it for tipping the leveling roll relatively to the shoe support, means operated by the pressure of fluid against it for pressing the roll against the shoe bottom, a control member movable in opposite directions along different paths, means operated by the control member the. pressure exerted by the roll on the shoe bot- 75 in response to its movement .in either direction along one of said paths for controlling the flow of pressure uid to the first fluid-pressure-operated means, and means operated by the control member in response to its movement in either direction along another one of said paths for controlling the ow of pressure fluid to the other of said iluid-pressure-operated means.

21. In a leveling machine, a leveling roll, a shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling roll to operate progressively along the shoe bottom, means for tipping the leveling roll laterally of the shoe support, and a manually operated member movable in the direction of tipping movement of the leveling roll in control of said tipping means to tip the roll in the direction of movement of said member in accordance with the extent of movement of said member.

22. In a leveling machine, a leveling roll, a shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling roll to operate progressively along the shoe bottom, means for tipping the leveling roll laterally of the shoe support, a manually operated member movable transversely to the direction of movement of the shoe support, and means operated by said member for controlling the tipping means to tip the roll in the direction of movement of said member in accordnce with the extent of movement of said mem- 23. Ina leveling machine, a leveling roll, a shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling roll to operate progressively along the shoe bottom, power-operated means for tipping the leveling roll laterally of the shoe support, and a manually operated member movable in the direction of tipping movement of the leveling roll in control of said power-operated means to tip the roll in the direction of movement of said member in accordance with the extent of movement of said member,

24. In a leveling machine, a leveling roll, a shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling roll to operate progressively along the shoe bottom, fluid-pressure-operated means for tipping the leveling roll laterally of the shoe support, and a manually operated member movable transversely to the direction of movement of the shoe support in control of s-aid fluid-pressure-operated means and arranged to cause the roll to tip in the direction of movement of said member in accordance with the extent of movement of said member.

25. In a leveling machine, a leveling roll, a shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling roll to operate progressively along the shoe bottom, means ior tipping the leveling roll relatively to the shoe support, means for controlling said tipping means enabling the operator at will to start, stop and reverse the tipping movements of the leveling roll, and means tending at all times to maintain the leveling roll in a substantially horizontal position.

26. In a leveling machine, a leveling roll, a shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling roll to operate progressively along the shoe bottom, huid-pressure-operated means for tipping the leveling roll relatively to the shoe support, manual control means for said fluidpressure-operated means to determine the direction and extent of the tipping movements of the leveling roll, and means acting on said fluid-pressure-operated means tending at all times to maintain the leveling roll in a substantially horizontal position.

27. In a leveling machine, a leveling roll, a shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling roll to operate progressively along the shoe bottom, fluid-pressure-operated means for imparting to said leveling roll tipping movements in opposite directions laterally of a shoe on said support, a lever for controlling said fluid-pressure-operated means to cause the direction of tipping movement of the roll to correspond to the direction of tipping movement of the control lever from an initial central position, and means acting on the control lever tending at all times to hold it in its central position with the leveling roll in a substantially horizontal position.

28. In a leveling machine, a leveling roll, a shoe supporil mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling roll to operate progressively along the shoe bottom, fluid-pressure-operated means for imparting to said leveling roll tipping movements in opposite directions laterally of a, shoe on said support, a lever for controlling said fluidpressure-operated means to cause the direction of tipping movement of the roll to correspond to the direction of tipping movement of the control lever from an initial central position, and means for returning the control member to its central position when released by the operator.

29. In a leveling machine, a leveling roll, a shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling roll to operate progressively along the shoe bottom, a fiuid-pressure-operated motor for moving the leveling roll toward the shoe bottom, a valve for controlling the ow of pressure uid to said fluid-pressure-operated motor, a second valve for controlling the pressure of the operating fluid delivered to said motor, and a single manually operated member in control of both said valves.

30. In a leveling machine, a leveling roll, a shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling roll to operate progressively along the shoe bottom, a fluid-pressure-operated motor for moving the leveling roll toward the shoe bottom, a valve for controlling the flow of pressure fluid to said fluid-pressure-operated motor, a second valve for controlling the pressure of the operating fluid delivered to said motor, means normally positioning the second valve to cause uid at a predetermined minimum pressure to be delivered to said motor, a control member, and means operated by the control member rst to open the first-named valve and secondly to adjust the second valve to increase the pressure of the operating uid delivered to said motor` 31. In a leveling machine, a leveling roll, a shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling roll to operate progressively along the shoe bottom, a iiuid-pressure-operated motor for moving the leveling roll toward the shoe bottom, a valve for controlling the ow of pressure uid to said fluid-pressure-operated motor, a second valve for controlling the pressure of the operating fluid delivered to said motor, means normally positioning the second valve to cause fluid at a predetermined minimum pressure' to be delivered to said motor, a control member, and means operated by the control member rst to open the rst-named valve and secondly to adjust the second valve to increase the pressure of the operating fluid delivered to said motor, in accordance with the extent of further movement of the control member in the same direction.

32. In a leveling machine, a leveling roll, a shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling roll to operate progressively along the shoe bottom, a fluid-pressure-operated motor for moving the leveling roll toward the shoe bottom, a valve for controlling the flow of pressure uid to said huid-pressure-operated motor, a second valve for controlling the pressure of the operating fluid delivered to said motor, means normally positioning the second valve to cause fluid at a predetermined minimum pressure to be delivered to said motor, a control member, means operated by the control member to open the first-named valve, and means arranged to be engaged by the control member after it has been moved to open the first-named valve for operating the second-named valve to increase the pressure of the operating fluid delivered to said motor.

33. In a leveling machine, a leveling roll, a shoe supported mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling roll to operate progressively along the shoe bottom, a uid-pressure-operated motor for moving the leveling roll toward the shoe bottom, a. valve controlling the ow of pressure fluid to said fluid-pressure-operated motor, a. pressureregulating valve controlling the pressure of the operating uid delivered to said motor, a third valve in control of said pressure-regulating valve, means for opening and closing the rst-named valve, and means controlling the operation of said third valve to control the pressure-regulating valve.

34. In a. leveling machine, a leveling roll, a shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling roll to operate progressively along the shoe bottom, a fluid-pressure-operated motor for moving the leveling roll toward the shoe bottom, a valve controlling the flow of pressure fluid to said. fluid-pressure-operated motor, a pressure-regulating valve controlling the pressure of the operating uid delivered to said motor, a third valve in control of said pressureregulating valve, and asingle manually operated member in control of the first and last-named valves.

35. In a leveling machine, a leveling roll, a

shoe support mounted for swinging movements in directions lengthwise of a shoe thereon to cause the leveling roll to operate progressively along the shoe bottom, a duid-pressure-operated motor for moving the leveling roll toward the shoe bottom, a valve controlling the iiow of pressure iluid to said fluid-pressure-operated motor, a pressureregulating valve controlling the pressure of the operating iiuid delivered to said motor, a third valve in control of said pressure-regulating valve, means normally positioning said third valve to cause iluid at a predetermined minimum pressure to be delivered to said motor, a control member, and means operated by the control member to open the first-named valve in response to movement of the control member from a starting position and thereafter to adjust said third valve in accordance with further movements of the control member thereby to vary the operation of the pressure-regulating valve to vary the pressure of the operating fluid delivered to said motor.

FRANK W. DE TOUR. 

